Dumbrell Road Bulli Flood Mitigation

Consultation has concluded

As part of its commitment to managing flood and stormwater risks in our region, Wollongong City Council is working on a plan for flood mitigation works designed to benefit the Dumbrell Road area, located in the Collins Creek catchment in Bulli.

The pipe inlet next to the Balls Paddock Council reserve on Luxor Street is the first engineered structure that water flows through in this catchment. This inlet experiences significant blockage caused by a build-up of debris like branches, rocks and rubbish. We know that debris often makes its way through the pipe system to the Dumbrell Road culvert, which is more at risk of blockage. Balls Paddock is the best place for us to catch it before it flows into our stormwater system, but we also need to take steps to reduce the supply of debris between there and Dumbrell Road.

We’re working on two projects aimed at reducing flood risk in this area:

Channel Stabilisation. We plan to replace vegetation known to contribute to blockage of the culvert with better-suited plant species. We’ll also do some minor works to repair the walls of the channel between 2 Dumbrell Road and 4 Dumbrell Road. This work is intended to make them smoother and more resistant to damage during flooding. The handrail that is currently located on the south side of Dumbrell Road will also be upgraded.

Construction of a Debris Control Device. This structure will be installed at the inlet of the stormwater system next to Balls Paddock, to help stop debris travelling along the creek and into the pipe system, which exits into the channel. We’ve looked at what types of debris need to be captured and stored, controlling the supply of debris at the source, and what we’ll need to do on an ongoing basis to maintain the system.

The Frequently Asked Questions (FAQ) help explain the background to this project, some of the words we use when talking about reducing flood risk and how you can help with this project. We’ll be coming back to the community at a later date with the proposed design of the debris control device, to ask for feedback.

As part of its commitment to managing flood and stormwater risks in our region, Wollongong City Council is working on a plan for flood mitigation works designed to benefit the Dumbrell Road area, located in the Collins Creek catchment in Bulli.

The pipe inlet next to the Balls Paddock Council reserve on Luxor Street is the first engineered structure that water flows through in this catchment. This inlet experiences significant blockage caused by a build-up of debris like branches, rocks and rubbish. We know that debris often makes its way through the pipe system to the Dumbrell Road culvert, which is more at risk of blockage. Balls Paddock is the best place for us to catch it before it flows into our stormwater system, but we also need to take steps to reduce the supply of debris between there and Dumbrell Road.

We’re working on two projects aimed at reducing flood risk in this area:

Channel Stabilisation. We plan to replace vegetation known to contribute to blockage of the culvert with better-suited plant species. We’ll also do some minor works to repair the walls of the channel between 2 Dumbrell Road and 4 Dumbrell Road. This work is intended to make them smoother and more resistant to damage during flooding. The handrail that is currently located on the south side of Dumbrell Road will also be upgraded.

Construction of a Debris Control Device. This structure will be installed at the inlet of the stormwater system next to Balls Paddock, to help stop debris travelling along the creek and into the pipe system, which exits into the channel. We’ve looked at what types of debris need to be captured and stored, controlling the supply of debris at the source, and what we’ll need to do on an ongoing basis to maintain the system.

The Frequently Asked Questions (FAQ) help explain the background to this project, some of the words we use when talking about reducing flood risk and how you can help with this project. We’ll be coming back to the community at a later date with the proposed design of the debris control device, to ask for feedback.